Sofa



FIG. 1 is a front elevational view, showing my new design for a sofa.

FIG. 2 is a right side elevational view thereof.

FIG. 3 is a left side elevational view thereof.

FIG. 4 is a rear view thereof.

FIG. 5 is a top plan view thereof.

FIG. 6 is a bottom plan view thereof.

FIG. 7 is a rear and side perspective view thereof; and,

FIG. 8 is a front and side perspective view thereof. 

I claim, the ornamental design for a sofa, as shown and described. 